| 1 (1362) | Bulgarian Academy of Sciences * | BGR |  |
| 2 (1767) | Georgi Nadjakov Institute of Solid State Physic Bulgarian Academy of Sciences | BGR | |
| 3 (1772) | Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences | BGR | |
| 4 (2410) | Sofia University | BGR |  |
| 5 (2530) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | |
| 6 (2541) | Academician Emil Djakov Institute of Electronics Bulgarian Academy of Sciences | BGR | |
| 7 (2650) | University of Plovdiv Paisii Hilendarski | BGR | |
| 8 (3324) | Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences | BGR | |
| 9 (3715) | Technical University of Sofia | BGR | |
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